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MG MGB Technical - Clutching for support!
I am about to have a slighted tuned 1860cc engine with fast road cam and slighted tweaked unleaded head built. I am hoping for maybe 105hp. My question is will a standard good quality clutch be ok or do I need some thing stronger. If so what and from where?
Thanks for any help
|Even the Vauxhall Chevette was using 20/50 oil in its gearbox in the 1980s!|
A lot of old british morcycles also used 20/50 oil widely - in the engine and gearbox.
Straight single viscosity oil was common pre 1960 but when multigrade oils became available a lot of manufacturers changed to them.
|Oops, wrong thread, I think|
|Dave O'Neill 2|
|Standard clutch will be fine.|
But if you go for a decent exhaust system, with some gas flowing, bulleted valve guides, 3 angle valve seats, K & N's and richer needles you might see more than 105 bhp
|Standard clutch will take a supercharger, but the OD may suffer over time. Having said that there are uprated clutches available.|
|I've been using the HD Borg and Beck clutch behind my supercharged 1860 cc engine since the early '90s. It requires less effort than a stock unit and uses a roller ball throwout bearing. Truly a great unit for just a bit more money. A good investment. RAY|
|'Ware the roller bearing release bearing! Unless the release arm holds it concentric with the first-motion shaft you get rapid wear, mine didn't last more than five years of average mileage before it seized and completely wrecked the cover-plate when the friction plate was barely half worn. As the previous graphite bearing also broke up (the casting) I looked at things very closely, to find the bearing offset from the shaft by about 3/16" and did some work to centralise it. Don't go by modern cars using them, like the midget 1500 and factory V8 they have a carrier which keeps them concentric with the shaft at all times and the problem doesn't occur. Some people say their MGB has no problems with a roller bearing, and it won't - IF the alignment is such that it is concentric.|
Don't take my word for it: https://www.youtube.com/watch?v=4KIdkOWVcGg&feature=youtu.be
This thread was discussed between 23/08/2016 and 25/08/2016
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